CN104448575B - Low-temperature resistant PP-R pipe and preparation method thereof - Google Patents

Low-temperature resistant PP-R pipe and preparation method thereof Download PDF

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Publication number
CN104448575B
CN104448575B CN201410727274.0A CN201410727274A CN104448575B CN 104448575 B CN104448575 B CN 104448575B CN 201410727274 A CN201410727274 A CN 201410727274A CN 104448575 B CN104448575 B CN 104448575B
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China
Prior art keywords
color masterbatch
pipe
beta
beta nucleater
temperature resistant
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CN201410727274.0A
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CN104448575A (en
Inventor
李统
李统一
龙莹珠
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Liansu (hebei) Co Ltd Municipal Pipeline
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Liansu (hebei) Co Ltd Municipal Pipeline
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/223—Packed additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/18—Applications used for pipes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/24—Crystallisation aids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2310/00—Masterbatches

Abstract

The invention provides a low-temperature resistant PP-R pipe. The low-temperature resistant PP-R pipe is prepared from the following raw materials in parts by weight: 100 parts of PP-R, 5 parts of PP-B1 and 1-5 parts of a modified masterbatch with a beta-nucleating agent being loaded on the surface. Compared with the prior art, the low-temperature resistant PP-R pipe provided by the invention has the advantages that because the beta-nucleating agent is loaded on the surfaces of inorganic particles in the masterbatch to modify the masterbatch, and PP-B induced crystals are added to prepare the PP-R pipe with a high content of beta-crystals, the crystallization effect of the beta-crystals can be improved significantly, and the problem that the existing PP-R pipe is brittle at a low temperature can be solved effectively.

Description

A kind of low temperature resistant pp-r tubing and preparation method thereof
Technical field
The present invention relates to polypropylene pipe field, more particularly, to a kind of low temperature resistant pp-r tubing and preparation method thereof.
Background technology
Pp-r tubing has the advantages that heat preservation energy-saving, environmental protection and excellent heat-resisting, oxidative stability and sanitation performance, with Other cold hot water pipings are compared, and pp-r pipeline is moderate, and cost performance is high, are suitable for the domestic market demand.
At present, the popularization of China pp-r pipe is restricted by several factors: the resin dedicated performance of (1) domestic pp-r is not good, The domestic degree of raw material is not high.(2) low-temperature flexibility of pp-r pipe is poor.Because low-temperature impact-resistant performance is poor, in low temperature environment bar Under part, pp-r tubing can occur low temperature brittleness, therefore easily damages in transit.
In recent years, high-performance β-ppr material is prepared using nucleating agent have become as and prepare one of pp-r pipe technology Important directions, but there is also some problems and need to solve: (1) because the brilliant the best growing condition of β is between (110-130 DEG C), And too fast rate of temperature fall can reduce the brilliant growth of β；(2) preparation process of the nucleating agent of commercialization at present is complicated, cost Higher, because consumption is few, difficulties in dispersion in pp-r, it is limited to the β crystalline substance inducing effect of pp-r；(3) pp-r pipe color masterbatch is general Containing inorganic particulates such as titanium dioxides, these inorganic particulates have α-nucleation to pp-r, if being directly added into nucleating agent side Method, the filler with α-nucleation has an impact to the beta-nucleated effect of nucleating agent, leads to the beta-nucleated effect of nucleating agent Reduce, even do not form β-ppr.
Therefore, how on the basis of low cost, so that pp-r is managed and form substantial amounts of β crystalline substance in the fabrication process, thus protecting While holding rigidity and intensity, improve low temperature tolerance ability, become the key preparing low temperature resistant pp-r pipe.
Content of the invention
It is an object of the invention to provide the low temperature resistant ability of pp-r tubing.
A kind of low temperature resistant pp-r tubing, by weight, including the raw material of following components,
100 parts of pp-r,
Pp-b 1-5 part,
Area load has modified color masterbatch 1-5 part of beta nucleater.
The preparation method that described area load has the modified color masterbatch of beta nucleater is first beta nucleater and titanium dioxide to exist Grinding in ball grinder loads, and melt extrudes pelletize and obtain modified color after then mixing the titanium dioxide and color masterbatch that have loaded nucleator Female.
The modified color masterbatch that described area load has beta nucleater is that the titanium dioxide containing in color masterbatch becomes through area load β Core agent is modified.
Described beta nucleater is n, n'- dicyclohexyl terephthalamide or p-phthalic acid calcium, plays the brilliant knot of induction β Brilliant effect.
The preparation technology of above-mentioned low temperature resistant pp-r tubing is that by pelletize after formula mixing, material is obtained PP Pipe Compound, Ran Houzhuan Materials, through double screw extruder extrusion molding, obtain product after being made annealing treatment.
The present invention, with respect to prior art, has such advantages as and beneficial effect:
The present invention is modified by the inorganic particulate in color masterbatch is carried out with area load nucleating agent, is simultaneously introduced pp-b induction The ppr tubing of high-beta crystal content is prepared in crystallization, and compared with prior art, β crystalline substance crystallization effect significantly improves, and can effectively solve the problem that pp- The problem of r tubing black brittleness.
Specific embodiment
Further describe the present invention with reference to specific embodiment.Unless stated otherwise, the present invention adopt reagent, Equipment and method are the conventional commercial reagent of the art, equipment and conventional use of method.
Embodiment 1
The material of tubing is made up of the raw material of following parts by weight:
100 parts of pp-r
5 parts of pp-b
3 parts of beta nucleater modified color masterbatch
The preparation method that described area load has the modified color masterbatch of beta nucleater is first beta nucleater and titanium dioxide to exist Grinding in ball grinder loads, and melt extrudes pelletize and obtain modified color after then mixing the titanium dioxide and color masterbatch that have loaded nucleator Female.
The modified color masterbatch that described area load has beta nucleater is that the titanium dioxide containing in color masterbatch becomes through area load β Core agent is modified.
Described beta nucleater is n, n'- dicyclohexyl terephthalamide, plays the effect of the brilliant crystallization of induction β.
After respectively mixed for above-mentioned material, by extrusion die extrusion molding more cooled, sizing, annealing obtain pp-r pipe Material.After tested, at -5 DEG C prepared of pp-r tubing, charpy impact test tubing breakage rate is 0, and tubing other performance meets gb/ The requirement of t 18742.2-2002.
Embodiment 2
The material of tubing is made up of the raw material of following parts by weight:
100 parts of pp-r
4 parts of pp-b
2 parts of beta nucleater modified color masterbatch
The preparation method that described area load has the modified color masterbatch of beta nucleater is first beta nucleater and titanium dioxide to exist Grinding in ball grinder loads, and melt extrudes pelletize and obtain modified color after then mixing the titanium dioxide and color masterbatch that have loaded nucleator Female.
The modified color masterbatch that described area load has beta nucleater is that the titanium dioxide containing in color masterbatch becomes through area load β Core agent is modified.
Described beta nucleater is p-phthalic acid calcium, plays the effect of the brilliant crystallization of induction β.
Preparation method is with embodiment 1, after tested, charpy impact test tubing breakage rate at -5 DEG C prepared of pp-r tubing For 0, tubing other performance meets the requirement of gb/t 18742.2-2002.

Claims (1)

1. a kind of low temperature resistant pp-r tubing it is characterised in that by weight, including the raw material of following components,
100 parts of pp-r,
Pp-b 1-5 part,
Area load has modified color masterbatch 1-5 part of beta nucleater,
The modified color masterbatch that described area load has beta nucleater is the titanium dioxide containing in color masterbatch through area load beta nucleater Modification,
The preparation method that described area load has the modified color masterbatch of beta nucleater is in ball milling first by beta nucleater and titanium dioxide Grind load in machine, melt extrude pelletize after then the titanium dioxide and color masterbatch that have loaded nucleator being mixed and obtain modified color masterbatch,
Described beta nucleater is n, n'- dicyclohexyl terephthalamide or p-phthalic acid calcium.
CN201410727274.0A 2014-12-04 2014-12-04 Low-temperature resistant PP-R pipe and preparation method thereof Active CN104448575B (en)

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Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
CN106750988B (en) * 2016-11-22 2019-08-30 广东联塑科技实业有限公司 A kind of PPR pipe and preparation method thereof with excellent low temperature toughness
CN109265831A (en) * 2018-09-25 2019-01-25 磐安县高科塑料制品厂 A kind of cold-resistant PP bellows and preparation method thereof
CN110343337B (en) * 2019-08-20 2022-04-08 浙江中财管道科技股份有限公司 Low-temperature toughened PP-R pipe and preparation method thereof
CN113061304B (en) * 2021-03-31 2022-08-19 长春联塑实业有限公司 Low-temperature-cracking-resistant PPR pipe material, preparation method thereof and prepared PPR pipe product

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